直接写得数.135×0= 300﹣50÷5= 760﹣10×50= 45÷(3×5)=0÷35= 200÷5÷4= 35﹣5×6= 58×0+987=
口算.×= += ×== = ×5=÷2= ﹣=
口算.0.75+= 0÷= ×= +20%=30÷= ×12×= 63:27= :=
直接写出得数.= = = = == = = = =
直接写出得数:2.4×= ; = ; :0.75= ; ÷ =0.1;0.180%×= ; 32÷(1+60%)= ; 2﹣1= ; ×40=.
= = = == = = =